At 17:07 22/10/2009, Eric B. wrote:
Yes, but can we be sure that subsequent proxies/lbs will always append to the final header in the list? I don't have Squid or anything else installed, so am not sure of it, but am going on assumption that they probably just grab the first XFF that they find.
If they do that I would say they're not compliant, and I actually believe they don't do that but actually append XFF at the end. A quick check through the squid source tells me it actually merges multiple headers with the same name into a CSL and adds XFF at the end. I expect everyone to do either that or use the pound approach, and add a new header at the end.
BTW, even though XFF is not defined in a standard, the Via header is, and it is assembled in the same order as XFF, so it's all very consistent.
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